I am building a new pc very soon and I am wondering what card setup I should get for the new rig. I will be gaming on a 60Hz 24'' LED Acer monitor at 1920x1080p. I want to be able to get all ultra settings in all games and not have to worry about slowdowns and stuff like that. I have also thought about, alot, a mid-range multi-gpu setup that would give me better performance then a GTX 680 and costs less, such as a GTX 660 ti SLI or 7870 GHz CFX solution. What is the best bang for the buck right now?